Amplifier reduces board space, complexity in industrial equipment

Norwood, Mass.—Analog Devices Inc. introduced the AD8295, a highly integrated precision instrumentation amplifier front-end that it claims uses 50 percent less board space than competing amplifier products for industrial and instrumentation applications.

The AD8295 incorporates an instrumentation amplifier with two operational amplifiers and two precision-trimmed matched resistors in a single 4-mm – 4-mm chip-scale package. The AD8295 in amp provides an integrated front end for industrial process controls, precision data acquisition systems, medical instrumentation equipment and Wheatstone bridge measurement applications.

According to ADI, the AD8295 in amp delivers the highest common-mode rejection (CMR) over frequency in its class. The CMR of competing devices typically falls off at 200 Hz, while the AD8295 maintains a minimum CMR of 80 dB to 8 kHz for all grades at G = 1, ADI said. High CMR over frequency allows the AD8295 to reject wideband interference and line harmonics, simplifying filter design. The on-board in amp is gain-programmable and uses a single resistor to set the gain from 1 to 1000, delivering 1 ppm/°C maximum gain drift (B grade), 8 nV/Hz maximum input voltage noise at 1 kHz, and 0.25-µV p-p input noise (0.1 Hz to 10 Hz).

Pricing: $2.89 each in 1,000-unit quantities.
Availability: December 2008.
Datasheet: Click here.

Analog Devices,

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